Originally Posted by ZinMiami

I had to access my Plenum 3 times now. First to install the original MD spacer months ago, then the ISO thermal kit, and lastly I had to go in there again to review my installation of the ISO kit due to an error code of 1283 popping up after the install a few weeks ago.

The lower plenum, at least mine, cannot tolerate this much activity. I now have 5 completely stripped threads. 3 around the perimeter and 2 in the center bolt group.

I torqued properly each time using a good quality in./lb wrench. Well regardless of the care, the threads could not stand up to the repeated access. Needless to say I am going back to stock when I receive the new lower plenum that I will order today and I will stay stock.

I have to take the car to the dealer to find the 1283 issue and I will not risk another plenum being ruined by putting all the mods back in afterwards. Tony from MD mentioned to me in an email that he has noticed the some castings are soft, with some softer than others. I guess have one of the softer ones.